40219994 has 16 divisors (see below), whose sum is σ = 64165608. Its totient is φ = 18842112.

The previous prime is 40219987. The next prime is 40219997. The reversal of 40219994 is 49991204.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 39853969 + 366025 = 6313^2 + 605^2 .

It is not an unprimeable number, because it can be changed into a prime (40219997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5384 + ... + 10460.

Almost surely, 2^40219994 is an apocalyptic number.

40219994 is a deficient number, since it is larger than the sum of its proper divisors (23945614).

40219994 is a wasteful number, since it uses less digits than its factorization.

40219994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5329.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 40219994 is about 6341.9235252406. The cubic root of 40219994 is about 342.6210174941.

The spelling of 40219994 in words is "forty million, two hundred nineteen thousand, nine hundred ninety-four".